I read the test RP says they did, and RP is supposed to stand up to Extreme Press. better. According to RP it survived way beyond the test, beating heck out of Mobil1 and lesser oils. Wanted to know if any independant company tested it with like results. RP claims 40* drop in readable engine temp with their oil for Harleys also.I am running RP in a 91 240 n/a Volvo that has 159,000 miles on engine. I figure to use best oil I can afford, and hopefully engine will run 150,000 or more mile further. Hoping to "arrest" any further wear on engine by using RP. Who has the "hard" evidence on motor oil comparison tests?? Or does every company yell "Our's Best" with no testing??